In this domain, to distinguish between the natural and the artificial is not as simple as we ́d think at first sight ́ because the chosen natural site has in effect already had human intervention, even so, the so-called natural waterfalls have been polluted from certain angles with unwanted vegetation growing etc. The natural is in fact, in today ́s terms, is what has been least modified. But such a definition doesn’t take under consideration of the effects of human waste which affect the review of these natural sites, simply because we perceive them by identifying objects that are artificial.
We live in a period of conservation, in opposition to times of invention. We must overcome being worried to have desire, to make birth to new visions. We do not work on natural site but on territories already strongly artificialized. And we lack scientific proof to act on the durable. We have not fallen into sustainable development while our cities were being built is because we didn’t intervene to oppose the appropriate global legislation. And our practices on project suffer from the absence of rigorous scientific work on which we could go further.
Michel Desvigne, Le Plateau de Saclay: Ancrage Geographique (2012)